The myth of LINQ (simplest sample for ADO.NET Entity Data Model)

If you are a .NET fan out there then you will basically hearing from many people asking, I have ADO.NET 2.0 so why is there a LINQ? It was a myth to me too. After Microsoft launch Service Pack 1 for Visual Studio 2008 then I clear some of my cloud in my head.

I will only mention one of the unique features here, ADO.NET Entity Data Model from ADO.NET Entity Framework. I have not found a better way to bind the Entity Model to DataGridView web control.

In order to create ADO.NET Entity Data Model, right click either Windows Application Project or Web Application Project and choose Add New Item… . Select ADO.NET Entity Data Model from the Add New Item dialog. After that you will have a file with edmx extension.

I have created a complete Windows Application sample using Northwind database in MS SQL 2008 Express. The Entity named NorthwindEntities. The entire sample consisted of 2 controls, 1 DataGridView and another is Button. I only have few lines of code in Button click event as below.

 private void btnGetCustomers_Click(object sender, EventArgs e)


  NorthwindEntities nwe = new NorthwindEntities();


  var cus = from customer in nwe.Customers

            select customer;


  dataGridView1.DataSource = cus;


I guess no one will ever say this is difficult.

The complete code is in The sample file name is WinAppEntities.rar. My MSN ID is


About chanmingman

Since March 2011 Microsoft Live Spaces migrated to Wordpress ( till now, I have is over 1 million viewers. This blog is about more than 50% telling you how to resolve error messages, especial for Microsoft products. The blog also has a lot of guidance teaching you how to get stated certain Microsoft technologies. The blog also uses as a help to keep my memory. The blog is never meant to give people consulting services or silver bullet solutions. It is a contribution to the community. Thanks for your support over the years. Ming Man is Microsoft MVP since year 2006. He is a software development manager for a multinational company. With 25 years of experience in the IT field, he has developed system using Clipper, COBOL, VB5, VB6, VB.NET, Java and C #. He has been using Visual Studio (.NET) since the Beta back in year 2000. He and the team have developed many projects using .NET platform such as SCM, and HR based applications. He is familiar with the N-Tier design of business application and is also an expert with database experience in MS SQL, Oracle and AS 400.
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